Login and Logout views
----------------------

We have an app instance:

    >>> from zope.testbrowser.testing import Browser
    >>> manager = Browser()
    >>> manager.handleErrors = False
    >>> manager.addHeader('Authorization', 'Basic manager:schooltool')
    >>> manager.open('http://localhost/')
    >>> 'SchoolTool' in manager.contents
    True

We add a person

    >>> from schooltool.basicperson.browser.ftests.setup import addPerson
    >>> addPerson('Some', 'User', 'user', 'secret')

We have the views ``@@login.html`` and ``@@logout.html`` on the main
application object. Those views log in or log out the user of the session.

    >>> anonymous = Browser()
    >>> anonymous.open('http://localhost/')
    >>> anonymous.getLink('Log In').click()
    >>> anonymous.headers['status']
    '200 Ok'

Make sure the current version number is somewhere on the page:

    >>> import schooltool.common
    >>> schooltool.common.get_version() in anonymous.contents
    True

Incorrect password:

    >>> anonymous.getControl('Username').value = 'user'
    >>> anonymous.getControl('Password').value = 'bad'
    >>> anonymous.getControl('Log in').click()
    >>> 'Username or password is incorrect' in anonymous.contents
    True

Another attempt:

    >>> anonymous.getControl('Username').value = 'user'
    >>> anonymous.getControl('Password').value = 'secret'
    >>> anonymous.getControl('Log in').click()

Now we are authenticated:

    >>> 'Some User' in anonymous.contents
    True

Let's check whether our POST data preservation facilities work:

    >>> anonymous.open("http://localhost/persons/user/preferences")
    >>> anonymous.getControl('public').selected
    False

.. With mechanize 0.2, goBack reloads the page unless we read the full response

    >>> workaround = anonymous.contents

    >>> anonymous.getLink('Log Out').click()
    >>> anonymous.goBack()

Now let's enter some data:

    >>> anonymous.getControl('public').click()
    >>> anonymous.getControl('Apply').click()

We get a log in form:

    >>> anonymous.getControl('Username').value = 'user'
    >>> anonymous.getControl('Password').value = 'secret'
    >>> anonymous.getControl('Log in').click()

We visit the user's preferences again:

    >>> anonymous.open("http://localhost/persons/user/preferences")

And the option we have clicked on is set:

    >>> anonymous.getControl('public').selected
    True

Now we can log out:

    >>> anonymous.getLink('Log Out').click()

We are logged out:

    >>> anonymous.getLink('Log In')
    <Link text='Log In' url='http://localhost/auth/@@login.html'>

